Cooking vessel



E. G. RWLEY.

COOKING VESSEL.

APPLICATION msu Dic. a, 1920.

1,406,159, Pated Feb. 7, 1922.

g g 1f UNITED STATES PATENT OFFICE.-

Env/#Anne aowLEY, OE'NEWAEK, NEW JERSEY, 'AssIGNoR 0E oNEvHALE'ro sUN TYPEWRITER COMPANY, OF'NEWARK, vNEW' JERSEY, AKCORPORATIO 0F NEW Y JERSEY. y

COOKING VESSEL. K

y .Specificationof-.Letters Patent. 'Patented Feb 7, `1922 l limitation mea December s, 1920. serial No. 42e-,05a

i portable boilers, such as are used for domestic and other purposes where it is required to raisethe temperature of a liquid by the application of heat at the bottom, the main vobject being to provide a boiler in which the liquid contained therein is heated far more rapidly. than in a boiler of the usual construction exposed to ,the same heat. Y A further object is to conserve the heat as Yfully as possible,.directing it upon the boiler. kheating elements, the same being arranged to cause a lively circulation of the liquid within the boiler` directlyV upon heat .being applied.

These objects are attained by the novel construction, combination and arrangement Vof parts hereinafter described and shown in the accompanying drawings, forming a material part of this disclosure, and in which Figure 1 is a partial side elevational, partial vertical sectional view of a boiler, made in accordance with the invention.

Figure 2 is a fragmentary bottom plan.

view thereof.

" Figure 3 is a similar fragmentary viewy looking from the top of the same.

It is a well known fact that a vessel having ya substantially flat bottom and cylindrical ory flaring side walls will when placed over ,a heat source, cause theliquid, as water, within itV to boil due to the heat imparted to it, the water, when in a state of ebullition, showing minute bubbles of steam rising from the bottom and inward from the sides, the water moving towards the center ofthe vessel in. eddying currents caused the slight differ-v ence in temperature.

. In thel present invention the water moves oppositely or outwardly from the center, which is raised in a geyser like manner due to the peculiarities of the structure.

Referring to the drawings in detail, the nnumeral 10 designates the walls of a vessel, here shown to be cylindrical, although the shape is inconsequential, the body beingprovided with handles 11 secured in any preshown) may' be supplied. f

ferredmanner and obviously a cover, (not A bottom 12 is raised from the extreme lower edge of the walls, this bottom being secured by an internal ange 13 as shown or other approved method whereby a tight and effective joint'is obtained, the bottom being preferablyvlevel and smooth upon its inner surface,

FormedV through the bottom 12 are a plul rality of circular openings 14 in which are secured the ends of relatively small tubes 15, preferably made of copper, bent into looped formation'and rigidly fastened by spot welding, hard soldering or like means not read- V ily vaffected by continuous or intermittent subjections to heat.

lThese tubes are arranged .preferably in series of rows, at more or less distance from the center relatively uniformly spaced and in radial relation, the'bight of the bent tubes clearing the plane of the vessels bottom edge.

In operation, the vessel having been par.- tially filled with the liquid to be boiled, is

Yplaced over any common form of heater, as

a gas burner, the flames ofwhich, -when ignited are concentrated by the guard like ange 13 and wall of the vessel, so that substantiallyall of the heat emanations lare directed upon the'tubes 15, which as will be understood, are filled with the liquid.

' This results in an almost immediate boiling effect as the small quantityv of liquid in each ytube is surrounded by intense heat, causing it to form ysteam at once which passes up through the body of liquid in the vessel heating the same in an unusually rapid manner.

Itis found that the liquid when the device is in full operation, tends to lform a cone or geyser like appearance, being hotter at the center than the edges and that the liquid is maintained. in active circulation lso long as heat is applied.

Thus the effective heating area ofthe bottom is not only very considerably increased by the added area of the tubes, but the liquid is brought. as nearly as may be intowhile a f preferred embodiment has been body h'aving a tight bottom, a dependingv guard element circumadjacent the bottom Vand forming With said bottom 'a heating shown, it is possible to make minor changes in construction Without departing from the vspirit of the invention.

" Having'thus described my invention, what Inolaim asnew and desire to secure by Letters Patent, is i l. A heating vessel comprising a hollow chamber and radially dis osed tubular loops fixed at their ends in said bottomand disposed 'in said chamber Vwhereby the exposed heat area of the bottom is increased. Y

2., A vheating vessel comprising a hollowri This specification signed land witnessedV lthisseventh day of December, 1920.

EDWARD VGr. ROWLEY.v

Witnesses FREDK C, Flsornan, F. NoLn 

